lxdream 0.9.1| filename | src/sh4/sh4.h |
| changeset | 904:5b92e51ac06b |
| prev | 903:1337c7a7dd6b |
| next | 929:fd8cb0c82f5f |
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| author | nkeynes |
| date | Thu Dec 11 23:26:03 2008 +0000 (15 years ago) |
| permissions | -rw-r--r-- |
| last change | Disable the generational translation cache - I've got no evidence that it actually helps performance, and it simplifies things to get rid of it (in particular, translated code doesn't have to worry about being moved now). |
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1 /**
2 * $Id: sh4.h 577 2008-01-01 05:08:38Z nkeynes $
3 *
4 * This file defines the public functions and definitions exported by the SH4
5 * modules.
6 *
7 * Copyright (c) 2005 Nathan Keynes.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 */
20 #ifndef lxdream_sh4_H
21 #define lxdream_sh4_H 1
23 #include "lxdream.h"
24 #include "mem.h"
26 #ifdef __cplusplus
27 extern "C" {
28 #endif
31 /**
32 * SH4 is running normally
33 */
34 #define SH4_STATE_RUNNING 1
35 /**
36 * SH4 is not executing instructions but all peripheral modules are still
37 * running
38 */
39 #define SH4_STATE_SLEEP 2
40 /**
41 * SH4 is not executing instructions, DMAC is halted, but all other peripheral
42 * modules are still running
43 */
44 #define SH4_STATE_DEEP_SLEEP 3
45 /**
46 * SH4 is not executing instructions and all peripheral modules are also
47 * stopped. As close as you can get to powered-off without actually being
48 * off.
49 */
50 #define SH4_STATE_STANDBY 4
52 /**
53 * sh4r.event_types flag indicating a pending IRQ
54 */
55 #define PENDING_IRQ 1
57 /**
58 * sh4r.event_types flag indicating a pending event (from the event queue)
59 */
60 #define PENDING_EVENT 2
62 /**
63 * SH4 register structure
64 */
65 struct sh4_registers {
66 uint32_t r[16];
67 uint32_t sr, pr, pc;
68 union {
69 int32_t i;
70 float f;
71 } fpul;
72 uint32_t t, m, q, s; /* really boolean - 0 or 1 */
73 float fr[2][16]; /* Must be aligned on 16-byte boundary */
74 uint32_t fpscr;
75 uint32_t pad; /* Pad up to 64-bit boundaries */
76 uint64_t mac;
77 uint32_t gbr, ssr, spc, sgr, dbr, vbr;
79 uint32_t r_bank[8]; /* hidden banked registers */
80 int32_t store_queue[16]; /* technically 2 banks of 32 bytes */
82 uint32_t new_pc; /* Not a real register, but used to handle delay slots */
83 uint32_t event_pending; /* slice cycle time of the next pending event, or FFFFFFFF
84 when no events are pending */
85 uint32_t event_types; /* bit 0 = IRQ pending, bit 1 = general event pending */
86 int in_delay_slot; /* flag to indicate the current instruction is in
87 * a delay slot (certain rules apply) */
88 uint32_t slice_cycle; /* Current nanosecond within the timeslice */
89 int sh4_state; /* Current power-on state (one of the SH4_STATE_* values ) */
90 };
92 extern struct sh4_registers sh4r;
94 /**
95 * Switch between translation and emulation execution modes. Note that this
96 * should only be used while the system is stopped. If the system was built
97 * without translation support, this method has no effect.
98 *
99 * @param use TRUE for translation mode, FALSE for emulation mode.
100 */
101 void sh4_translate_set_enabled( gboolean use );
103 /**
104 * Test if system is currently using the translation engine.
105 */
106 gboolean sh4_translate_is_enabled();
108 /**
109 * Explicitly set the SH4 PC to the supplied value - this will be the next
110 * instruction executed. This should only be called while the system is stopped.
111 */
112 void sh4_set_pc( int pc );
114 /**
115 * Execute (using the emulator) a single instruction (in other words, perform a
116 * single-step operation).
117 */
118 gboolean sh4_execute_instruction( void );
120 /* SH4 breakpoints */
121 void sh4_set_breakpoint( uint32_t pc, breakpoint_type_t type );
122 gboolean sh4_clear_breakpoint( uint32_t pc, breakpoint_type_t type );
123 int sh4_get_breakpoint( uint32_t pc );
125 #ifdef __cplusplus
126 }
127 #endif
128 #endif /* !lxdream_sh4_H */
.